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发表于 2021-10-11 17:21:30
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PEX Ignore Capacitance
Parasitic extraction
Specifies to ignore certain types of capacitance between specific layers. Ignores or removes
parasitic capacitances specified through layers and capacitance models ALL, FRINGE,
NEARBODY, or PLATE, and capacitance types COUPLING, DEVICE, or INTRINSIC.
Usage
Syntax 1, multi-layer capacitance calculations for all types:
PEX IGNORE CAPACITANCE [GLOBAL] ALL [SUBSTRATE]
{layer | VIA layer1 layer2} {layer | VIA layer1 layer2} [{layer | VIA layer1 layer2}...]
Syntax 2, multi-layer coupled capacitance calculations for non-via layers:
PEX IGNORE CAPACITANCE [GLOBAL] {FRINGE | NEARBODY | PLATE}
layer1 layer2 [layer ...]
Syntax 3, intrinsic capacitance calculations for one or more non-via layers:
PEX IGNORE CAPACITANCE [GLOBAL] INTRINSIC {FRINGE | PLATE} layer
[layer ...]
Syntax 4, intrinsic capacitance calculations for all layers:
PEX IGNORE CAPACITANCE [GLOBAL] INTRINSIC ALL {layer | VIA layer1
layer2} [{layer | VIA layer1 layer2} ...]
Syntax 5, complete coupling capacitance calculations for all layers:
PEX IGNORE CAPACITANCE [GLOBAL] COUPLING [INTRINSIC] {layer | VIA
layer1 layer2} [{layer | VIA layer1 layer2} ...]
Syntax 6, nearbody capacitance calculations for single-layer:
PEX IGNORE CAPACITANCE [GLOBAL] NEARBODY {layer | VIA layer1 layer2}
Syntax 7, intra-device capacitance calculations:
PEX IGNORE CAPACITANCE [GLOBAL] DEVICE [INTRINSIC] device_layer
[device_layer...] marker_layer
Syntax 8, intra-cell capacitance calculations:
PEX IGNORE CAPACITANCE [GLOBAL] DEVICE [INTRINSIC] device_layer
[device_layer...] CELL cell_name [cell_name ...]
Syntax 9, single-layer or via capacitance calculations for all types:
PEX IGNORE CAPACITANCE [GLOBAL] ALL [SUBSTRATE] {layer | VIA layer1
layer2} |
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